Self-contained foam-generating device with built-in breathing apparatus
AssigneesCommissariat A L'energie Atomique Et Aux Energies Alternatives, Aryballe
InventorsFabien Frances, Pierre Venditti, Célia Lepeytre
Life of this patent
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Abstract
A breathing apparatus for use by the operator, is supplied with compressed air also used to manufacture the foam to be generated on site, and optionally run a pneumatic pump sucking up the foaming liquid, using suitable regulators. An automatic shut-off device is added to automatically cut off the supply elsewhere than to the breathing apparatus when the quantity of air available becomes low.
Claims4
A foam-generating device, comprising a reservoir of foaming liquid, a container of compressed air, a first pipe leaving the reservoir and passing through a pump, being connected to suction and delivery ports of said pump, a second pipe leaving the container, the first pipe and the second pipe leading to a mixer of the foaming liquid and compressed air, wherein the foam is formed;
- the second pipe comprising a bifurcation, fitted with an atmospheric pressure expansion valve, which leads to a breathing apparatus intended for an operator of the device, wherein the second pipe is fitted with an obturator downstream of the bifurcation, and wherein the obturator is associated with a compressed air pressure tap at an outlet of the container, which automatically closes the obturator when said pressure drops below a threshold, such that the compressed air is only delivered to the breathing apparatus.
Dependencies are inferred from the claim text.